Thrashing-machine



3 Sheets-Sheet 1.

(No Model.)

J. C. SCHNEIDER & H. GHRISTOEEERSON.

THEASHING MACHINE.

No. 267,599. Patented N0V.14, 1882.

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(No Model.) y SSheets-Sheet 3. J. G. SCHNEIDER 8v H. CHRISTOEEERSONK THRASHING MACHINE.

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WITNESSES:

IlNrri-Ln STATES lJArnNr @einem JOHN G. SCHNEIDER AND HANS CHRISTOFFERSON, F HUDSON, W'ISCONSIN.

THRASHING-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 267,599, dated November 14, 1882.

(No model.)

To all whom it mcy concern:

Be it known that we, JOHN C. SCHNEIDER and HANS GHRisroFFERsoN, of Hudson, in the county of St. Croix and State of Visconsin,

and exact description otI the invention, which will enable others skilled in the art to which it appertains to make and use the same, ret'- erence being had to the accompanying drawings, which form a part of this specification, in whichv Figurel is a longitudinal vertical section of our improved thrashing-machine. Fig. 2 is a detail plan view of the interoperating separators. Fig. 3 is a detail View ofthe shaft and pitmen for operating the separators. Fig. 4 is a detail view ot' the mechanism for imparting an alternate joint vertical and rearward vihratory motion to the grain-separators and straw-carriers. Fig. 5 isa sectional view of one lof the pitmen, and Fig. 6 is a detail View of one ot' the double springs which support the strawcarrier.

Similar letters ci' reference indicate corresponding parts in all the figures.

This invention contemplates certain improvements in the grain-separators and strawcarriers of thrashing-machines, and has for its object to efi'ect the speedy and thorough separation of the grain from the straw, to4 so construct the pitmen by which the shakingscreens of the separator and carrier are operated that all slack or lost motion 7 caused by wear may readily be taken up, and to impart to said screens an easy and evenly-balanced vibratory motion.

To this end our improvement consists in a novel construction and combination ot" parts, as hereinafter more fully described and claimed.

In the accompanying` two sheets of drawings, A' marks the casing or housing of the machine, containing the several operative parts. a is the feed-hopper, within which is hung the thrashing-cylinder b; and M is the beater, the blades or wings ot' which aid in beating out the grain as the straw passes .under it to the interoperating separator-frames or screens. rlhe latter are composed of a series of long and narrow screens, L, made of sheet metal, and having each a double row of square or rectangular pert'oratons, l, arranged to intersect or alternate with one another. 'lhese screens are separated from one another sidewise by boards L', set on end, and are snppcrted at opposite ends upon cross-bars I( and K', which are in turn supported each upon two springs-one at each end-a nd marked r'espectively A A and 'B B. The outermost screens L L on each side ot' the machine are flanked by narrow screens D D, also of perforated sheet metal, but with more solid surface and smaller openings than the intervening screens L L. Each ot' the double springs A A and B B, upon which said screens-are su pported, (by their end bars K and K',) is ot' a peculiar construction, as plainly shown in Fig. 6. They consist of an arm, d, having an enlarged head, D', forming the box d', adapted to receive the tenoned ends of the bars Kand K', and pivoted to the side ofthe casing at d2. In lthe head D' are two slots-one on each side of the box d'. In these slots slide the upper free ends of the springs, while their lower ends are bolted rmly to a block,D2,which is rmly fastened to the casing by bolts and screws. In rocking to and fro on the pivot d'2 the two springs slide up and down in their respective slots, thus relieving a large part of the strain on them, while they spring enough to make the motion ofthe screens and racks smooth and even. L and side screens or racks, D D, have an alternate falling and rising motion in an inclined plane-or, rather, an alternate joint Vertical and rearward vibratory motion-for the purpose of subjecting the straw, with the commingled grain, to a thorough shaking and separating action while it is fedpto the rear end of the machine. This motion is effected by The set or series of middle screens the mechanism shown more clearly in the de- Aconnected by an arm or crank, H, to a rockshaft, E, at each end of which is secured a cross head or arm, G. At each end ofthe arm G (equidistant from the central rock-shaft, E) is apitman, F and F', the upper-end of one ot' IOO which, F, is connected by its box j" to the end of bar K, while the other, F', is connected by its boxf to the side screen, D. It will ofcourse be understood that there is a pair' of pitmen, F F', arranged in this manner on each side of the machine, or at each end of shaft E, while only one crank II and one pitman I are necessary.

It will thus be seen that screens L and D have an alternate rising and falling motion, causing them to rise and fall alternately above and below the upper edges of the stationary boards L' The double springs A and I3 prevent a jerky motion ot' the intermediate set of screens L, causing them to vibrate with a smooth and easy motion, and also relieve the pitmen F from strain. The parallel stationary boards L' are supported edgewise upon crossbeams J J, which also operate to limit the downward throw ot' the screens L and D. rllhe forward spring, 15 B will readily yield to the vibratory reciprocating motion of screen L, while at the same time they should be made stiieuough to support the weightof straw and grain carried upon the screens, which purpose the arms d, pivoted at d2, serve.

The pitmen F and F' are of the construction shown in Fig. 5 ot' the drawings. They are made of wood, in two parts or sections, m and n, each part being constructed exactly like the other, with a recess or cut'out portion, o, and a projecting part, p. This projecting part is bored through longitudinally fortheinsertion of a long nutted bolt, which thus, as will be seen, passes obliquely through the body of the pitman from one side to the other. The cappiece g of each ofthe end boxes,ff, forms an extension of the projecting part p. When the box f (either one of them) is worn, it may be tightened up by screwing down the nut ot' bolt N, all parts ofthe box wearing evenly, so that the two parts 'm and n will slide up upon each other, and thus reduce the size ofthe worn box. rIhis adjustment may be effected without removing the pitman or taking it apart, but simply by tightening the oblique bolt N and the transverse end or cap bolts o' r.

Having thus described our invention, We claim and desire to secure by Letters Patent of the United Statesl. In a grain-separator for thrashing-machines, the combination of the casing A', side racks, D D, the series of parallel stationary boards L", set on edge, screens L L,alter11atiug with fixed boards L', supporting cross-bars K K', the two pairs of supporting double springs A A and B B, pitmen F F', rock-shaft E, provided with the fixed arms or cross-heads G and crank Il, and pitman I, all constructed and combined to operate substantially as and for the purpose herein shown and set forth.

2. In a grainseparator for thrashing-machines, the combination, with the crank-shaft and screens, of the improved pitman herein show n and described, composed ofthe recessed parts m and a, formed with cap-pieces g g and oblique extensions p p, and the oblique tightening-bolt N, constructed and combined substantially in the manner and for the purpose herein shown and specified.

3. In a grain-separator for thrashing-machines, the combination, with the straw-carriers, of a supporting-frame, blocks D2, rigidly secured to said support, springs bolted to the opposite sides ot' said blocks, oscillating arms d, pivoted to the support, and constructed with slotted heads D', in which the springs are adapted to play, substantially as and for the purpose shown and set forth.

In testimony that weclaim the foregoing as our own we have hereunto affixed our signatures in presence of two witnesses.

JOHN O. SCHNEIDE t. HANS CHRISTOFFERSON.

lVitnesses CHARLES D. McKINNoN, ALLAN BEGGs. 

